diff --git a/core/src/mindustry/Vars.java b/core/src/mindustry/Vars.java
index 76b1d49e3d..f75b55b5db 100644
--- a/core/src/mindustry/Vars.java
+++ b/core/src/mindustry/Vars.java
@@ -80,8 +80,8 @@ public class Vars implements Loadable{
     public static final float miningRange = 70f;
     /** range for building */
     public static final float buildingRange = 220f;
-    /** ticks spent out of bound until self destruct. */
-    public static final float boundsCountdown = 60 * 7;
+    /** duration of one turn. */
+    public static final float turnDuration = 5 * Time.toMinutes;
     /** for map generator dialog */
     public static boolean updateEditorOnChange = false;
     /** size of tiles in units */
diff --git a/core/src/mindustry/content/Fx.java b/core/src/mindustry/content/Fx.java
index a0f2bc11b7..6efa5d774c 100644
--- a/core/src/mindustry/content/Fx.java
+++ b/core/src/mindustry/content/Fx.java
@@ -1189,6 +1189,23 @@ public class Fx{
         Lines.poly(e.x, e.y, 6, e.rotation + e.fin(), 90);
     }),
 
+    unitShieldBreak = new Effect(35, e -> {
+        if(!(e.data instanceof Unitc)) return;
+
+        Unitc unit = e.data();
+
+        float radius = unit.hitSize() * 1.3f;
+        color(Pal.shield, e.fout());
+
+        randLenVectors(e.id, (int)(radius * 0.7f), radius, radius * e.finpow(), (x, y) -> {
+            Fill.poly(e.x + x, e.y + y, 3, e.fout() * 3f, Angles.angle(x, y));
+        });
+
+
+        stroke(1f * e.fout());
+        Lines.circle(e.x, e.y, radius);
+    }),
+
     coreLand = new Effect(120f, e -> {
     });
 }
diff --git a/core/src/mindustry/content/UnitTypes.java b/core/src/mindustry/content/UnitTypes.java
index 7e1126fb30..5f18d656ab 100644
--- a/core/src/mindustry/content/UnitTypes.java
+++ b/core/src/mindustry/content/UnitTypes.java
@@ -167,7 +167,7 @@ public class UnitTypes implements ContentList{
             health = 400;
             buildSpeed = 0.4f;
             engineOffset = 6.5f;
-            hitsize = 7f;
+            hitsize = 8f;
         }};
         
         /*
diff --git a/core/src/mindustry/entities/def/ShieldComp.java b/core/src/mindustry/entities/def/ShieldComp.java
index 0bb407c149..7a8a75b7a6 100644
--- a/core/src/mindustry/entities/def/ShieldComp.java
+++ b/core/src/mindustry/entities/def/ShieldComp.java
@@ -1,21 +1,31 @@
 package mindustry.entities.def;
 
+import arc.util.*;
 import mindustry.annotations.Annotations.*;
+import mindustry.content.*;
 import mindustry.gen.*;
 
 @Component
-abstract class ShieldComp implements Healthc{
+abstract class ShieldComp implements Healthc, Posc{
     @Import float health, hitTime;
     @Import boolean dead;
 
     /** Absorbs health damage. */
     float shield;
+    /** Shield opacity. */
+    transient float shieldAlpha = 0f;
 
     @Replace
     @Override
     public void damage(float amount){
         hitTime = 1f;
 
+        boolean hadShields = shield > 0.0001f;
+
+        if(hadShields){
+            shieldAlpha = 1f;
+        }
+
         float shieldDamage = Math.min(shield, amount);
         shield -= shieldDamage;
         amount -= shieldDamage;
@@ -25,6 +35,16 @@ abstract class ShieldComp implements Healthc{
             if(health <= 0 && !dead){
                 kill();
             }
+
+            if(hadShields && shield <= 0.0001f){
+                Fx.unitShieldBreak.at(x(), y(), 0, this);
+            }
         }
     }
+
+    @Override
+    public void update(){
+        shieldAlpha -= Time.delta() / 12f;
+        if(shieldAlpha < 0) shieldAlpha = 0f;
+    }
 }
diff --git a/core/src/mindustry/game/GlobalData.java b/core/src/mindustry/game/GlobalData.java
index 15b6228ae2..24a73a942e 100644
--- a/core/src/mindustry/game/GlobalData.java
+++ b/core/src/mindustry/game/GlobalData.java
@@ -20,7 +20,6 @@ import static mindustry.Vars.*;
 public class GlobalData{
     private ObjectMap<ContentType, ObjectSet<String>> unlocked = new ObjectMap<>();
     private ObjectIntMap<Item> items = new ObjectIntMap<>();
-    private Array<Satellite> satellites = new Array<>();
     private boolean modified;
 
     public GlobalData(){
diff --git a/core/src/mindustry/game/Turns.java b/core/src/mindustry/game/Turns.java
deleted file mode 100644
index 1e252bb2df..0000000000
--- a/core/src/mindustry/game/Turns.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package mindustry.game;
-
-public class Turns{
-}
diff --git a/core/src/mindustry/game/Universe.java b/core/src/mindustry/game/Universe.java
index 430493087d..a15549f2bb 100644
--- a/core/src/mindustry/game/Universe.java
+++ b/core/src/mindustry/game/Universe.java
@@ -6,12 +6,14 @@ import arc.util.*;
 import mindustry.content.*;
 import mindustry.type.*;
 
-import static mindustry.Vars.state;
+import static mindustry.Vars.*;
 
 /** Updates the campaign universe. Has no relevance to other gamemodes. */
 public class Universe{
     private long seconds;
     private float secondCounter;
+    private int turn;
+    private float turnCounter;
 
     public Universe(){
         load();
@@ -35,6 +37,7 @@ public class Universe{
 
     public void update(){
         secondCounter += Time.delta() / 60f;
+
         if(secondCounter >= 1){
             seconds += (int)secondCounter;
             secondCounter %= 1f;
@@ -45,6 +48,15 @@ public class Universe{
             }
         }
 
+        //update turn state - happens only in-game
+        turnCounter += Time.delta();
+
+        if(turnCounter >= turnDuration){
+            turn ++;
+            turnCounter = 0;
+            onTurn();
+        }
+
         if(state.hasSector()){
             //update sector light
             float light = state.getSector().getLight();
@@ -56,6 +68,10 @@ public class Universe{
         }
     }
 
+    private void onTurn(){
+        //create a random event here, e.g. invasion
+    }
+
     public float secondsMod(float mod, float scale){
         return (seconds / scale) % mod;
     }
@@ -69,11 +85,16 @@ public class Universe{
     }
 
     private void save(){
-        Core.settings.putSave("utime", seconds);
+        Core.settings.put("utime", seconds);
+        Core.settings.put("turn", turn);
+        Core.settings.put("turntime", turnCounter);
+        Core.settings.save();
     }
 
     private void load(){
         seconds = Core.settings.getLong("utime");
+        turn = Core.settings.getInt("turn");
+        turnCounter = Core.settings.getFloat("turntime");
     }
 
 }
diff --git a/core/src/mindustry/graphics/Pal.java b/core/src/mindustry/graphics/Pal.java
index 982b77c80b..02220b982e 100644
--- a/core/src/mindustry/graphics/Pal.java
+++ b/core/src/mindustry/graphics/Pal.java
@@ -8,6 +8,9 @@ public class Pal{
     items = Color.valueOf("2ea756"),
     command = Color.valueOf("eab678"),
 
+    shield = Color.valueOf("7e8ffc").mul(1.3f).a(0.7f),
+    shieldIn = Color.black.cpy().a(0f),
+
     bulletYellow = Color.valueOf("fff8e8"),
     bulletYellowBack = Color.valueOf("f9c27a"),
 
diff --git a/core/src/mindustry/logic/LogicDialog.java b/core/src/mindustry/logic/LogicDialog.java
new file mode 100644
index 0000000000..184c57a4a5
--- /dev/null
+++ b/core/src/mindustry/logic/LogicDialog.java
@@ -0,0 +1,12 @@
+package mindustry.logic;
+
+import mindustry.ui.dialogs.*;
+
+public class LogicDialog extends FloatingDialog{
+
+    public LogicDialog(){
+        super("");
+        clear();
+        addCloseButton();
+    }
+}
diff --git a/core/src/mindustry/world/blocks/experimental/LogicExecutor.java b/core/src/mindustry/logic/LogicExecutor.java
similarity index 98%
rename from core/src/mindustry/world/blocks/experimental/LogicExecutor.java
rename to core/src/mindustry/logic/LogicExecutor.java
index eada670acf..715740d3f6 100644
--- a/core/src/mindustry/world/blocks/experimental/LogicExecutor.java
+++ b/core/src/mindustry/logic/LogicExecutor.java
@@ -1,4 +1,4 @@
-package mindustry.world.blocks.experimental;
+package mindustry.logic;
 
 import mindustry.gen.*;
 
diff --git a/core/src/mindustry/logic/LogicNode.java b/core/src/mindustry/logic/LogicNode.java
new file mode 100644
index 0000000000..1e9e2cc7dd
--- /dev/null
+++ b/core/src/mindustry/logic/LogicNode.java
@@ -0,0 +1,4 @@
+package mindustry.logic;
+
+public class LogicNode{
+}
diff --git a/core/src/mindustry/type/UnitType.java b/core/src/mindustry/type/UnitType.java
index 2e5e48f575..02ffc02d65 100644
--- a/core/src/mindustry/type/UnitType.java
+++ b/core/src/mindustry/type/UnitType.java
@@ -141,6 +141,16 @@ public class UnitType extends UnlockableContent{
         if(drawCell) drawCell(unit);
         if(drawItems) drawItems(unit);
         drawLight(unit);
+
+        if(unit.shieldAlpha() > 0){
+            drawShield(unit);
+        }
+    }
+
+    public void drawShield(Unitc unit){
+        float alpha = unit.shieldAlpha();
+        float radius = unit.hitSize() * 1.3f;
+        Fill.light(unit.x(), unit.y(), Lines.circleVertices(radius), radius, Tmp.c1.set(Pal.shieldIn), Tmp.c2.set(Pal.shield).lerp(Color.white, Mathf.clamp(unit.hitTime())).a(Pal.shield.a * alpha));
     }
 
     public void drawControl(Unitc unit){